You might want to take a seat for this one: an early Gingerbread build has leaked for the Samsung Galaxy S I9000, and is now available for download. The file first landed in the hands of one Tricky103, and shortly thereafter was downloaded from Samsung's internal database and uploaded to a public mirror courtesy of iammodo.

Installation instructions are virtually non-existent in the post, so you should probably know your way around modding already before attempting this (update)turns out installation instructions aren't there because it's super simple: just use the three button combo to flash the new ROM.